I had to have a GTT in my third pregnancy because baby had a slightly larger than average tummy measurement on the scan. I was diagnosed with Gestational Diabetes which I controlled with my diet. The daft thing was I had a low bmi and actually lost weight in my pregnancy.
I had a post pregnancy GTT on Wednesday, just awaiting my results and praying I don't have to do it again.
If you want to know anything, feel free to mail me.
Ali